<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>animation</title>
</head>

<body>
        <div class="github">
                <a href="https://github.com/zhansingsong/svg-tutorials" class="github-corner"
                    aria-label="View source on GitHub"><svg width="80" height="80" viewBox="0 0 250 250"
                        style="fill:#70B7FD; color:#fff; position: absolute; top: 0; border: 0; right: 0;"
                        aria-hidden="true">
                        <path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>
                        <path
                            d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2"
                            fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>
                        <path
                            d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z"
                            fill="currentColor" class="octo-body"></path>
                    </svg></a>
                <style>
                    .github-corner:hover .octo-arm {
                        animation: octocat-wave 560ms ease-in-out
                    }
    
                    @keyframes octocat-wave {
    
                        0%,
                        100% {
                            transform: rotate(0)
                        }
    
                        20%,
                        60% {
                            transform: rotate(-25deg)
                        }
    
                        40%,
                        80% {
                            transform: rotate(10deg)
                        }
                    }
    
                    @media (max-width:500px) {
                        .github-corner:hover .octo-arm {
                            animation: none
                        }
    
                        .github-corner .octo-arm {
                            animation: octocat-wave 560ms ease-in-out
                        }
                    }
                </style>
            </div>
    <style>
        .svg {
            fill: none;
            stroke: #f4368b;
            stroke-width: 10px;
            width: 100%;
            height: 440px;
        }
        
        .path1 {
            transform: translate(25%, 10%);
            stroke-dasharray: 523.1047973632812;
            stroke-dashoffset: 0;
            animation: dash 2s linear 3s alternate 1;
        }
        
        .path2 {
            transform: translate(25%, 10%);
            /* stroke-dasharray: 523.1047973632812; */
            /* stroke-dashoffset: 523.1047973632812; */
        }
        
        @keyframes dash {
            from {
                stroke-dashoffset: 523.1047973632812;
            }
            to {
                stroke-dashoffset: 0;
            }
        }
    </style>
    CSS动画
    <svg class="svg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" id="Capa_1" x="10" y="10" viewBox="0 0 400 400" xml:space="preserve">
        <g>
          <path class="path1" d="M150.383,18.301c-7.13-3.928-15.308-6.187-24.033-6.187c-15.394,0-29.18,7.015-38.283,18.015    c-9.146-11-22.919-18.015-38.334-18.015c-8.704,0-16.867,2.259-24.013,6.187C10.388,26.792,0,43.117,0,61.878    C0,67.249,0.874,72.4,2.457,77.219c8.537,38.374,85.61,86.771,85.61,86.771s77.022-48.396,85.571-86.771    c1.583-4.819,2.466-9.977,2.466-15.341C176.104,43.124,165.716,26.804,150.383,18.301z"/>
        </g>
    </svg> JS动画：<button class="replay">重播</button>
    <svg class="svg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" id="Capa_1" x="10" y="10" viewBox="0 0 400 400" xml:space="preserve">
      <g>
        <path class="path2" d="M150.383,18.301c-7.13-3.928-15.308-6.187-24.033-6.187c-15.394,0-29.18,7.015-38.283,18.015    c-9.146-11-22.919-18.015-38.334-18.015c-8.704,0-16.867,2.259-24.013,6.187C10.388,26.792,0,43.117,0,61.878    C0,67.249,0.874,72.4,2.457,77.219c8.537,38.374,85.61,86.771,85.61,86.771s77.022-48.396,85.571-86.771    c1.583-4.819,2.466-9.977,2.466-15.341C176.104,43.124,165.716,26.804,150.383,18.301z"/>
      </g>
    </svg>
    <script>
        const path2 = document.querySelector('.path2');
        const replay = document.querySelector('.replay');
        const totalLength = path2.getTotalLength();
        path2.style.strokeDasharray = totalLength;
        path2.style.strokeDashoffset = totalLength;

        let current_frame = 0;
        let total_frames = 160;
        const draw = function() {
            let progress = current_frame / total_frames;
            if (progress > 1) {
                window.cancelAnimationFrame(handle);
            } else {
                current_frame++;
                path2.style.strokeDashoffset = totalLength * (1 - progress);
                handle = window.requestAnimationFrame(draw);
            }
        };
        draw();
        replay.addEventListener('click', () => {
            console.log('click');
            if (current_frame >= 160) {
                current_frame = 0;
                total_frames = 160;
                draw();
            }
        });
    </script>
</body>

</html>